National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Areas of Dangerous Heat and Severe Thunderstorms

Dangerous heat will persist across the Southwest U.S. through Friday with daytime highs of 110-115°F. Heat across the southern Plains will briefly ease to near-normal by late week before returning over much of the Plains into next week. Scattered strong to severe thunderstorms are possible across parts of the Northeast U.S. on Thursday. Damaging wind, hail, and a tornado or two are possible. Read More >

Hazardous Weather Conditions

Current conditions at

McKinney - McKinney National Airport (KTKI)

Lat: 33.18°NLon: 96.59°WElev: 584ft.

Fair

80°F

27°C

Humidity 67%
Wind Speed N 5 mph
Barometer 29.94 in (1012.9 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 27 Aug 12:53 am CDT
Extended Forecast for

Frisco TX

Heat Advisory August 27, 01:25am until August 27, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 27, 01:25am until August 27, 08:00pm

    NOW until 8:00pm Thu

    Heat Advisory

  • Overnight

    Low: 78 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: Sunny and hot, with a high near 100. Heat index values as high as 109. Northeast wind 5 to 10 mph.

    High: 100 °F

    Hot

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 77. East northeast wind 5 to 10 mph.

    Low: 77 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 98. Heat index values as high as 106. East wind 5 to 10 mph.

    High: 98 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 77. East southeast wind 5 to 10 mph.

    Low: 77 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 99. South wind 5 to 10 mph.

    High: 99 °F

    Hot

  • Saturday Night

    Saturday Night: Clear, with a low around 78. South southeast wind around 10 mph.

    Low: 78 °F

    Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 99. South wind around 10 mph, with gusts as high as 20 mph.

    High: 99 °F

    Hot

Detailed Forecast

Overnight
A 20 percent chance of showers before 4am. Mostly clear, with a low around 78. Northeast wind around 5 mph.
Thursday
Sunny and hot, with a high near 100. Heat index values as high as 109. Northeast wind 5 to 10 mph.
Thursday Night
Partly cloudy, with a low around 77. East northeast wind 5 to 10 mph.
Friday
Sunny, with a high near 98. Heat index values as high as 106. East wind 5 to 10 mph.
Friday Night
Mostly clear, with a low around 77. East southeast wind 5 to 10 mph.
Saturday
Sunny and hot, with a high near 99. South wind 5 to 10 mph.
Saturday Night
Clear, with a low around 78. South southeast wind around 10 mph.
Sunday
Sunny and hot, with a high near 99. South wind around 10 mph, with gusts as high as 20 mph.
Sunday Night
Clear, with a low around 78. South wind 10 to 15 mph.
Monday
Sunny, with a high near 98.
Monday Night
Mostly clear, with a low around 78.
Tuesday
Sunny, with a high near 98.
Tuesday Night
Mostly clear, with a low around 79.
Wednesday
Sunny and hot, with a high near 100.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Frisco TX
 33.16°N 96.81°W (Elev. 699 ft)
Last Update:
9:26 pm CDT Aug 26, 2026
Forecast Valid:
1am CDT Aug 27, 2026-6pm CDT Sep 2, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation